Natural gas pipeline soft soil foundation settlement control device

The invention relates to a settlement control device for a soft soil foundation of an external transportation natural gas pipeline. The settlement control device is mainly composed of an LNG storage tank, an infusion pump, a liquid inlet pipe, a liquid return pipe, a vaporizer, a communicating pipe, a signal monitoring terminal and a monitoring computer. And the low-temperature LNG liquid passes through the liquid inlet pipe and the liquid return pipe and then returns to the vaporizer. A plurality of communicating pipes are arranged between the liquid inlet pipe and the liquid return pipe, the liquid inlet pipe, the liquid return pipe and the liquid inlet pipe are laid below a natural gas output pipeline, the cooling capacity can be adjusted by inputting the cooling capacity into a surrounding soft soil foundation, freezing the stratum shape and monitoring the soil temperature in real time, and therefore effective control over stratum settlement is achieved. Soft soil foundation settlement control is carried